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首页> 外文会议>IUPAC 10th International conference on novel materials and their synthesis: Book of abstracts >SYNTHESIS OF HYBRID MESOPOROUS TIO_2 NANOPARTICLES WITH NOBLE METALS USING SUPERCRITICAL ALCOHOLS
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SYNTHESIS OF HYBRID MESOPOROUS TIO_2 NANOPARTICLES WITH NOBLE METALS USING SUPERCRITICAL ALCOHOLS

机译：超临界醇合成含贵金属的杂亚甲基TiO 2纳米粒子

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摘要

Much attention has been paid to noble metal decorated mesoporous nanoparticles in expectation of high performance in catalysis. We have demonstrated that supercritical alcohols are one of the most promising reaction media for synthesis of mesoporous metal oxide nanospheres, such as SiO_2, TiO_2, ZnO, ZrO_2, and CeO_2, doped by rare earth elements. Here, we describe a new approach to control morphologies of noble metal decoration onto/into mesoporous TiO_2 nanospheres. One-pot and single-step reaction of Ti(O~iPr)_4 with HAuCl_4 in supercritical methanol afforded Au@TiO_2 mesoporous nanospheres with core-shell and doping morphologies. Treatment of solid- and hollow-TiO_2 nanospheres with HAuCl_4 resulted in Au@TiO_2 with surface dispersion and yolk-core-shell morphologies, respectively. Similarly, noble metal alloy nanoparticles such as Au-Pt-Pd were also introduced onto/into mesoporous TiO_2 nanospheres with similar morphologies.
机译：期望在催化中具有高性能，已经对贵金属装饰的介孔纳米颗粒给予了很多关注。我们已经证明，超临界醇是合成中孔金属氧化物纳米球（如SiO_2，TiO_2，ZnO，ZrO_2和CeO_2）的最有前途的反应介质之一，稀土元素掺杂。在这里，我们描述了一种新的方法来控制贵金属装饰到/进入介孔TiO_2纳米球的形态。 Ti（O〜iPr）_4与HAuCl_4在超临界甲醇中的一锅一步反应，得到具有核壳结构和掺杂形态的Au @ TiO_2介孔纳米球。用HAuCl_4处理固体和空心TiO_2纳米球，分别产生具有表面分散和卵黄-核-壳形貌的Au @ TiO_2。类似地，还将贵金属合金纳米粒子（例如Au-Pt-Pd）引入具有相似形貌的介孔TiO_2纳米球上/之中。

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